On Sat, Oct 31, 2020 at 06:52:08PM +0200, Eli Zaretskii wrote:
> > From: Philipp Stephani <p.stephani2@gmail.com>
> > Date: Sat, 31 Oct 2020 17:43:57 +0100
> > Cc: 44349@debbugs.gnu.org
> > 
> > Am Sa., 31. Okt. 2020 um 17:35 Uhr schrieb Eli Zaretskii <eliz@gnu.org>:
> > >
> > > > From: Philipp Stephani <p.stephani2@gmail.com>
> > > > Date: Sat, 31 Oct 2020 16:57:54 +0100
> > > >
> > > > > doprnt.c:493: Emacs fatal error: assertion failed: ASCII_CHAR_P (fmtchar)
> > > > > Fatal error 6: Aborted
> > > > > Abort trap: 6
> > >
> > > I cannot say I understand why that assertion is there.
> > 
> > Line 81 of doprnt.c states that non-ASCII characters aren't supported.
> 
> I don't see why we would want to enforce that, it sounds like a grave
> limitation.  Maybe I'm missing some background here.  The version we
> have on emacs-27 does support non-ASCII characters in the format.

Patch attached.

I can't see any other special cases that need to be handled and all my
tests worked, so I think this is all that's needed.

-- 
Alan Third